Functions And Operation Examples - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4.5.2

Functions and operation examples

1. General type
X000
T200
X000
Current
value
Y000
2. Retentive type
X001
T250
X002
t1
X001
Current
value
Y001
X002
3. Potentiometer type
1) When variable analog potentiometers built in the FX
[Basic example]
X003
This register stores the
value (0 to 255) of variable
analog potentiometer.
[Applied example]
M8000
FNC 22
RUN monitor
"D8030 (VR2) value x 2" is transferred to D0 (D1).
X003
98
T200
K123
Set value
(constant)
Y000
A data register
can be
specified also.
1.23 sec
Set value
Set value
T250 (constant)
K345
A data register
can be
Y001
specified also.
RST T250
Retentive time
t2
t1 + t2 = 34.5 sec
Set value
T10 D08030
0 to 25.5 sec
D8031 K 2
MUL
(0 to 51 sec)
T10 D 0
The set value range can be
changed (up to 32,767) by multiplying
the register value by "n".
Do not use D1 in other programs.
When the drive input X000 of the timer coil T200 turns ON, the
current value counter for T200 adds and counts clock pulses of
10 ms. When the counted value becomes equivalent to the set
value K123, the output contact of the timer turns on.
In other words, the output contact turns on 1.23 seconds after the
coil is driven.
When the drive input X000 turns OFF or when the power is
turned off the timer is reset and the output contact returns.
When the drive input X001 of the timer coil T250 turns ON, the
current value counter for T250 adds and counts clock pulses of
100 ms. When the counted value becomes equivalent to the set
value K345, the output contact of the timer turns on.
Even if the drive input X001 turns OFF or the power is turned off
during counting, the timer continues counting when the operation
restarts. The retentive operating time is 34.5 seconds.
When the reset input X002 turns ON, the timer is reset and the
output contact is returned.
main unit are used
3G
DO (D1)
Values of variable analog potentiometers
built in FX PLCs as standard are stored
3G
as numeric data in the range from 0 to 255
in the following special registers in
accordance with the scale position.
An obtained numeric value can be
specified as the indirectly specified value
for a timer to make
potentiometer type analog timer.
• VR1 → D8030 (Integer from 0 to 255)
• VR2 → D8031 (Integer from 0 to 255)
4 Devices in Detail
4.5 Timer [T]
a variable